利用VISA来实现的串口和GPIB通讯，程序主要读取了DUT(Device Under Test)的SN号-communicating serial port and GPIB with VISA, the program is to read the SN number of DUT (Device Under Test)

这是一个使用flex编写的通讯录代码，使用方便，有助于学习flex.-This is an address book written using flex code, easy to use, contribute to learning flex.